-3(1)-3(4)=x

Solution for -3(1)-3(4)=x equation:

Simplifying
-3(1) + -3(4) = x

Multiply -3 * 1
-3 + -3(4) = x

Multiply -3 * 4
-3 + -12 = x

Combine like terms: -3 + -12 = -15
-15 = x

Solving
-15 = x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-1x' to each side of the equation.
-15 + -1x = x + -1x

Combine like terms: x + -1x = 0
-15 + -1x = 0

Add '15' to each side of the equation.
-15 + 15 + -1x = 0 + 15

Combine like terms: -15 + 15 = 0
0 + -1x = 0 + 15
-1x = 0 + 15

Combine like terms: 0 + 15 = 15
-1x = 15

Divide each side by '-1'.
x = -15

Simplifying
x = -15